Yarn carrier or tube frame



Aug. 30, 1938. w BlXBY 2,128,875

- YARN CARRIER OR TUBE FRAME Filed Sept. 24, 1937 4 Sheets-Sheet 1 Aug. 30, 1938.

W. BIXBY YARN CARRIER OR TUBE FRAME Filed Sept. 24, 1957 4 Sheets-Sheet 2 Aug. 30, 1938. w. BIXBY YARN CARRIER OR TUBE FRAME 4 Sheets-Sheet 3 Filed Sept. 24, 1937 V Izwewfior: Wafier B12122;

w, BIXBY YARN CARRIER OR TUBE FRAME Aug. 30, 1938.

4 Sheets-Sheet 4 Filed Sept. 24, 1937" 1220322302 Waiier 13:11:22 by QEM W KIM/Jaw WW viii/59s Patented Aug. 30, 1938 UNITED STATES PATENT OFFICE Application September 24, 1937, Serial No. 165,522

- 14 Claims.

My present invention'relates to yarn carriers or so-called tube frames for supporting and presenting the tufting threads or yarns in the course of weaving pile ortuft fabrics, particularly Axminster carpets. Accuracy of presentation of such tuft yarns is important to the production of I an even fabric and the avoidance of yarn waste and the invention more particularly aims to provide for such carriers of tube frames means of simple construction whereby objectionable vibrationary movements of the frames and of the yarn ends carried by them are controlled and materially reduced or avoided.

Yam'carriers such as here concerned are com- .monly referred to in the trade as tube frames, and that term .is herein used to include all such carriers for presenting spooled tuft yarns, whether the guides for the yarn ends or unit groups of ends are in the form of tubes, as is more usual, or are otherwise formed, as for example in the manner of separators or lateral-threading wall members such as in the patents to Edgar F. Hathaway 1,941,916 and 1,941,917. The term tube as herein used accordingly is intended to characterize any form of yarn guiding means of a yarn carrier or tube frame.

Depending on the width of fabric being woven, such tube frames may be of widely varying lengths, from a very short frame of 3/4 length accommodating a single spool section up to such lengths as 24/4, supporting a plurality of spool sections, for weaving the widest fabrics and rugs. The term quarter refers to a quarter of a yard; hence a twelve-quarter (12/4) frame is one of a length to accommodate the tuft yarn supply for a carpet or other fabric 12/4 yards or 9 feet in width, a 16/4 frame is for a 12 foot fabric, a 24/4 frame for an 18 foot fabric, and so on.

In the weaving of the wider fabrics, by the use of broad looms, for instance 12/4 or greater, the frames become increasingly difficult to handue in the looms as their length increases. It willbe understood that in the Weaving operation the tube frames and. the spooled yarn supply carried by them are supported at their opposite ends by hangers or suspension brackets connecting them to carrier chains passing around sprockets, whereby the tube frames are brought one after another into yarn presenting position above the 0 warp shed of the fabric being woven.

In probably the majority of tuft fabric looms the tube frames are individually detached from the carrier chains as they successively come to the yarn presenting station and are carried down into the warp shed by transfer clutches which grasp the respective frames, lower them, wipe the yarn ends projecting from the tubes through the warp shed to place the tuft yarns between the warp ends, and subsequently lift and return the frames to their carrier chains which then progress another step. Such looms may be termed the frame-detaching or wiping-in type. In other looms, referred to as the gripper type, the tube frames are not taken from the carrier chains but have their yarn ends grasped by grippers or nippers on the loom which draw off the desired length of tufting yarn from the various frames as the latter are successively presented by the carrier chains.

While my presentinvention is particularly useful in connection with looms of the type first mentioned, in which the tube frames are detached from their chains and carried down into the loom, it is applicable as well for looms of the other type and to any form of tube frame, especially the longer frames, for wide work, of lengths say from 12/4 up to 24/4, one of the most common lengths being the 16/4 frame, for use in weaving 12 foot carpets. Obviously the invention may be used in connection with frames of any length should its advantages be desired for them.

With frames of say 12/4 or greater length much difficulty has been experienced in the weaving due to the fact that the long frames, being supported by the carrier chains and the transfer clutches only at their ends, not only tend to sag at their central portions but are subject to vibratory movement, during their travel with the chains and particularly, in the frame-detaching type of loom, during the handling and presenting of the frames by the transfer means or clutches. Such vibration in some instances becomes quite violent, reaching an amplitude of as much as 1 inches in the longer frames and lasting in such cases for a period of seconds or more following each disturbance.

It has heretofore been throught that the problem was merely that of overcoming the sag effect and accordingly efforts have been directed toward making the frames themselves more rigid, as by the use of tie-rods, bracing and the like expedients along the line of mere structural reinforcement. Other attempts to solve the problem have suggested the use of additional separate support for the frames between their ends, particularly during the period of detachment and introduction of the individual frames into the warp shed. The patents to E. J. Dacey Nos. 1,997,045, 1,997,046, and. 1,997,047 represent efiorts along this line. Such expedients as those of the Dacey patents,

however, add to the already complicated loom mechanism and necessitate an additional or double motion of the transfer clutches, as will be referred to at a later point.

In the course of extensive experiment and study I have determined that the objectionable effects on the weaving operation come primarily from the vibration of the frames rather than from their sagging and that the problem concerned may largely be solved by damping the vibratory movements of the frame and neutralizing or equalizing.

them along different planes. The normal sag may readily be compensated for by threading the tube frames so that the yarn ends will stand. along substantially a straight line when the frame is in use position. The effects of vibration, however, are not overcome in such manner since the vibratory movements tend to withdraw the yarn ends from the tubes at various different times and to extents depending on the violence of the movement. Such variations frequently leave the tuft yarns at one portion of the frame far out of line with those at another so that at some points an insufficient length of tuft may be inserted while at others too great lengths may be presented, thus tending to produce low and high spots in the fabric. Such conditions may to some extent be counteracted by pulling out from the tubes a considerably greater length of yarn to insure an adequate length at all portions along the frame but this practice involves a great waste oftufting yarn andis correspondingly expensive.

The problem is further complicated, particularly in the frame-detaching type of loom, by the fact that in the course of the wiping-in action the tube frames assume various different positions about their longitudinal axis, such for example as represented in the small diagrammatic Figs. 10, 11 and 12 of the accompanying drawings, so that the vibration occurs along both the vertical and the transverse axes of the frames. Recognizing this condition the vibration damping means of my invention may be so constructed and arranged that the vibrations in one direction are made to oppose and to tend to neutralize those in the direction perpendicular thereto, as well as damping and reducing to a minimum the vibration in such cases where the movement is wholly or mainly in one plane, generally the vertical plane. The means for accomplishing these results and as shown in the accompanying illustrations of exemplary embodiments of the invention comprises mainly one or more longitudinal elements or webs of a. strip or plate-like character and having one or more laterally disposed projections or extensions, with reference to the longitudinal axis of the tube frame. This means acts to direct and confine the vibrations to such small amplitude that it is unnecessary to supply excessively long portions of the tuft yarns beyond the front ends of the tubes in order to insure an adequate length of pile throughout the rug, carpet or other fabric being woven.

In the accompanying drawings illustrating examples of such means in association with tube frames of various constructions and dimensions,

Fig. 1 is a rear elevation illustrating one form of means embodying the invention as applied to one type of tube frame;

Fig. 2 is a cross-section of the frame of Fig. 1, upon a larger scale, taken through an intermediate portion thereof;

Figs. 3 and 4 are respectively a cross-section and an elevation, on an intermediate scale,

showing certain guard means of the invention in association with an intermediate bearing bracket for a yarn spool;

Fig. 5 is a view corresponding to Fig. 2 illustrating the invention in connection with a tube frame in which the horizontal axis of the carrier bar is greater than its vertical axis, referring to the position of the frames in their suspended position for use, as they are shown in the several figures of the drawings;

- Fig. 6 is an elevation looking at the side of a loom, showing several of the tube frames near the bottom or transfer point of the carrier chain loop, the lowermost frame, at the transfer point, being illustrated in dotted lines in its position on the chain. and in full line in a position assumed during the operation of introducing and wiping the tuft yarns into the warp shed;

Figs. '7, 8, and 9 are cross-sectional Views similarto Figs. 2 and 5, illustrating other structural forms of the invention; and r V I Figs. 10, 11 and 12 are diagrammatic views showing different positions of a tube frame in the-course of a wiping-in operation.

Referring first to Figs. 1 and 2, the tube frame as there shown comprises a longitudinal carrier bar I, of tubular form in this instance. The vertical diameter or axis of the bar of these figures is greater than its transverse diameter or axis, having reference to the suspended position of the frame, in which position the frames appear throughout the drawings. The carrier bar in each case forms the main supporting element or backbone of the tube frame. At its opposite ends are provided the suspension brackets or ears 2, including outer end bearings for spool sections 3, 3, the number of the latter determined by the width of the carpet or other fabric to be woven, according to established practice.

The frame is shown broken out in Fig; 1, so that only the end spool sections appear but it will be understood for example that in a 16/4 or 12 foot broad loom three or four such spools would be mounted on each frame. The inner ends of the spools are supported in central or intermediate bearings, one of which is indicated as a whole at 4 in Fig, 1, and upon a larger scale in Figs. 3 and 4.

Secured along the front face of the carrier bar, as by means of an attaching strip 5, Fig. 2, is the usual series of yarn guides or tuft tubes 6, illustrated as of the usual thin fiat tubular form. These tubes are anchored on the bar in side by side relation, in position to receive each a tuft yarn end or unit coming from the spool supply and to introduce and guide these yarns between the warps in the course of the'weaving operation. For purposes of identification and in conformity with trade usage the portion of the frame 'or of the carrier bar across which the tuft yarns extend and at which they are received by the guides or tubes is referred to as the front, the opposite portion of the tube frame as a Whole and of the carrier bar accordingly being herein termed the rear or the rear face.

Along the rear face of the carrier bar I, referring again to Fig. 2, there is rigidly secured a longitudinally extending element in the nature of a web or plate-like means I. This element may be formed integrally with the carrier bar, as seen for example in Figs. 7 and 8, or may consist of one or more separate pieces or strips attached to the bar in various ways, as for example by welding ,or by means of screws, bolts or the like as seen at 1', l" in Fig. 2.

a'liheyibration damping web, or fiangeyelement may beformed of any suitable sheet material having substantial inherent rigidity, such for example as sheet steel or other, metal, desirably of ,suchweight and gauge that the total weight of the tube frame is not unduly increased. In actualpractice I have found that a sheet steel element of a thickness approximating or slightly less than that of the material of the carrier bar itself is entirely satisfactory. As seen in Fig. 2 such damping element 1 comprises a lower or secured portion 8 positioned flatwise against the rear face of the carrier bar and rigidly fastened. The lower end of the secured portion in this example is inturned below the carrier bar to which it may be secured by welding or otherwise as at 8.

The damping element additionally comprises one or more extensions or laterally projecting portions 9. In the example seen in Fig. 2 a flange or web-like extension 9 projects upwardly toward the spool position and angularly with respect both to the vertical and the horizontal axes of the carrier bar, accordingly extending in a general direction diagonal or oblique of the bar section. This extension 9 is disposed with its upper portion adjacent the spool and the roll of yarns on the latter, thus increasing the overall width of the tube frame and supported yarn supply to a minimum extent. As shown in Fig. 2, it may be curved in general conformity with the adjacent portion of the spooled yarn supply thereby increasing its resistance to vibration.

The extension or projecting portion 9 of the damping element may be variously shaped and dimensioned as to height but preferably projects, at least through its major length, to a height approximately equal to that of the carrier bar and in most instances is carried up to approach or reach about the level of the spool axis, in some cases extending beyond the latter. Hence the extended portion 9 projects laterally of the bar, that is, beyond the outer periphery of .the main section of the bar, in this instance vertically and obliquely, the terms lateral or trans-- verse being herein used in the broad sense to include vertical, horizontal or intermediate directions. It will be understood that the term vertical is used herein to refer to the general direction in the plane of the yarns and in which the yarns lead off from the spool sections, this being the actual vertical direction in the positions of the frames as seen throughout the figures, with the exception of those in Fig. 6. Accordingly the term horizontal will be understood as referring to the direction substantially perpendicular to the plane of yarns, that is, actually horizontal in the majority of the views. Hence in the form illustrated in Fig.2, the extension 9 projects laterally or transversely and also angularly or obliquely and in the general upward direction, being disposed substantially diagonally opposite the row of tubes 6 audaccordingly tending to counterbalance them.

Lengthwise of the frame the damping element 1 extends along-at least the major central portion of the carrier bar and preferably substantially toward the ends ofthe latter. It is symmetrically disposed along the frame and generally is most effective when carried substantially the full length of the row of yarn guides or tubes 6, as represented in Fig. 1. It may be and preferably is of uniform height throughout its length, as such formation facilitates the handling. of the .so as to release the. frame from the chains.

fabric f at the breast-beam I6.

frame,.s po ols vand yarns in the setting-up operation of threading thelatter through the guides, ,buti-n some instances damping elements ending shortofthe ends of the yarn tube row, or of decreased height toward its ends or elsewhere have been successfully employed.

It will be understood, particularly from an inspection .of Figs. 6 and to 12, thatv the tube frames assume various positions about their longitudinal axis in the course of their travel with the carrier chains andrin the wiping-in operation. In Fig. 6 the carrier chain at one side of the room is represented at I2, together with the bottom sprocket l3 about which the chain passes at the delivery point above the loom. It will be seen that along the vertical runs of the chains the frames stand with their projetcing yarn ends substantially horizontal, that is, at right angles to the position of the frame as in Figs. 1 and 2. In the lower positions, to either side ofthe delivery point, the frames are obliquely positioned while at the delivery point the frame again stands substantially vertical. At this point the lowermost frame, in the framedetaching type of loom represented in Fig. 6, is grasped by the transfer arms or clutch, represented as a whole at the lower portion of Fig. 6 by the numeral M. This clutch device applies inward pressure on the yielding suspension hooks It then acts to swing the tube frame bodily downward with a sweeping motion, first turning the frame about its axis toward the left or clockwise as viewed in Fig. 6 and then sweeping it toward the right, to carry the delivery ends of the tuft guides or tubes with their projecting yarns between the warps of the shed in the space between the reed I5 and the fell or woven part of the The sweeping movement given the tuft yarns through the shedded warps, assisted by well-known accessory parts including severing knives, results in placing approximately U-shaped loops of tuft yarn between adjacent warps. These looped tufts are secured in place by one or more shots of weft which together with the inserted tufts are pressed forward into the woven part of the fabric.

By reason of the different positions assumed by the tube frames in the course of the weaving and particularly during the wiping-in operation, when the frames unavoidably receive considerable shock in their engagement and handling by the transfer clutches, the frames are subject to vibrations in the directions or planes both vertically and horizontally of the carrier bars, referring here again to the position of the frame as in the main figures. The relative amplitude of the vibrations in these two main axial planes is. somewhat dependent on the shape and positioning of the carrier bar, that is, depending on whether the latter is arranged with its minor cross axis in the vertical direction, as in Figs. 5, 7 and 8, for example, the vibrations, in a given position of the frame, tending to be greater in the direction of its minor axis. The vibrations also tend to as- .sume a greater amplitude in the actual vertical or gravitational plane. Hence, depending on the position of the frame at the time of the disturbance, the relative amplitude of vibration in the two axial planes may vary widely in any given frame.

With these conditions in view, an object of the invention is not only to reduce the amplitude of vibration at any given .time and in the various positions of the frame but also to equalize or make more uniform the range of the vibratory movement in the two planes. This result is largely obtained by the provision of my laterally projecting damping web or plate and by locating the same at a corner portion of the carrier bar, as in the example described with reference to Fig. 2. This damping projection may be otherwise arranged but has been found of great efliciency when so disposed at a corner region of the frame bar. It may project in substantial parallelism with one or the other cross axes of the bar, but again has been found to be particularly effective when obliquely or angularly disposed, as in Fig. 2, approaching to a greater or lesser extent the line of a diagonal through the bar. The provision of this laterally projecting web or plate, with its integral or other rigid attachment to the main section of the bar, as shown by graphs traced by the vibratory motion of the bar itself in actual tests, apparently causes the vibrations in the different planes, and particularly in mutually perpendicular or vertical and horizontal planes, to act against or counteract each other, thus equalizing and to a large extent neutralizing the vibratory motions and markedly decreasing their amplitude.

As previously noted, the damping element desirably extends along the major portion of the tube frame, and particularly its central portion. I have accordingly found it desirable in some cases, particularly where the frames are closely arranged on the carrier frames and in the instances of the longer frames, having a considerable normal sag, to provide guard means on the frames for avoiding disturbance of the spooled yarns of one frame by contact with the dampening element of an adjacent frame. Such contact is apt to turn the spool, either loosening or withdrawing the yarns, or pulling them irregularly.

For this purpose I have illustrated, referring more particularly to Figs. 3 and 4, a yarn guard comprising a cross piece or plate 20 secured to one of the intermediate or center spool bearing brackets 4 and projecting transversely or radially of the spool outwardly beyond the outer peripheral surface of the yarn supply. As will be clearly seen by reference to Fig. 6, the damping element 1 of one frame will contact this guard means 2!] of the adjacent frame in the event of its close approach thereto, preventing the dampener from engaging or disturbing the yarn supply of the latter. Such intermediate spool brackets, as best seen in Fig. 4, generally comprise feet 4 secured to the carrier bar and one or more uprights 4 hinged to the feet as at 4. The guard means such as the cross piece 26 accordingly in such case may be secured as by welding or otherwise to an upright member 4 of the bracket. In cases where the bracket is not hinged to the bar, such for example as the bracket next to the end bearing, or elsewhere, the guard element may be extended downwardly to and secured directly to the carrier bar or may be otherwise mounted on the bar in such manner as to provide a dampener contacting portion extending protectively beyond the periphery of the yarn supply.

In Fig. 5 I have shown an embodiment of the invention in which the carrier bar I has a horizontal diameter or axis greater than its vertical diameter or axis. The damping means or element I is shown as having its lower or attaching portion 8 secured to the rear face of the carrier bar by welding or otherwise, similarly as in Fig. 2. The projecting portion 9 is carried upwardly and angularly toward the level of the spool axis, the extension in this case being substantially fiat rather than curved as in Fig. 2. The inward extension or flange at the foot of the securing portion 8 is omitted but may be employed if desired. As in the previous example the damping plate or web serves to check and equalize vibrations in different directions transversely of the bar.

In Fig. 7 is illustrated a further embodiment in which the vibration damping means is formed as an integral portion of the material of the carrier bar, indicated as a whole by the numeral l The bar or frame proper in this case is composed of two similar but reversely positioned L-shaped metallic strips or bars 30, 3|. The L-member 30 for the front and top of the carrier has connecting flanges 32 and 33 along its opposite edge portions, and the other L-member 3| has similarly disposed flanges 34, 35. The corresponding flanges of the two L-members, when placed in their tube-forming position, abut each other flatwise and are rigidly secured together as by welding, as indicated at 36 and 31, providing a hollow tubular carrier bar of novel construction.

The flange portion of one of the L-members, herein one flange at the upper rear corner portion of the rectangular tube thus formed is extended laterally and in this case upwardly and somewhat angularly, as at 35 to provide the vibration damping extension or plate.

Fig. 8 represents another form in which the damping means again is an integral portion of the material of the carrier bar, the latter in this instance being of one-piece construction. Said bar, indicated as a whole by the numeral 1 comprises a metal sheet bent 'to hollow rectangular tubular form, to provide a top wall 40, front wall 4|, and bottom and rear walls 42 and 43. One of the walls at the edge of the initial strip, herein the top wall 40 is formed with a securing flange 44 secured as by welding at 45 to a flange 46 on the other end wall, herein the rear wall 43. One of said flanges, the flange 46 in the illustrated example, is extended laterally, upwardly in the form shown, and angularly or otherwise, as at 41, to provide vibration damping means in accordance with the principles previously described.

In all respects not otherwise referred to the tube frames of Figs. '7 and 8 may be similar to those of the other figures, it being understood that yarn guarding means and other features shown only in connection with Figs. 1 to 4 may be embodied in any of the forms.

Another form of damping means that has proved effective in use is shown in Fig. 9. In this instance a plate, indicated as a whole by the numeral 1' has a securing portion 8 rigidly attached at the rear face'of the carrier I and is formed with two angularly disposed extensions 9 and 9 the upper one having a further projecting extension or wing 9 This form of plate affords especially strong resistance to vibration of the mid-portion of the carrier bar, both in the vertical and the transverse directions. The vibration resistance of the damping plates, both in this example and in those of other figures may be still further increased by doubling over upon themselves the outer edge portions of the plates, as illustrated for example in Fig. 9.

By the use of the vibration damping means such as the webs or plate like elements constructed in accordance with the principles above described it becomespossible to insert a substanti'ally level or even row of tuft yarns; between, the warps and thusto 'ayoid'the ex ces'sivewaste'of yarn heretofore supplied'iri order to compensate for thefvibrations of each rovvbf tuft guiding members or yarn delivering tubes;

The invention alsornakes it possibleto dispense with external supportingmeans on the loom actmete engage and support a frame duringa transfer and wiping-in operation',such as the means of the Da'cey patents. previously referred to; Such intermediate supporting means n'ecessitat'e' a double motion of the transfer arms, one to carry down and return the tube frame, and a following second downward movement far enough to clear the suspended frames and to "allowthe chains to" move' the next frame into position. Accordinglywith the use of my present invention the speed of the weaving operation as" a whole may lie-increased and the loom mechanism simplified;

My invention isnotlimited' to the particular embodiments herein illustrated and described, its scopebeing"set"outin the following claims:

1. A yarn carrier or tube-frame for pile fabric looms, comprising, in combination, a hollow tubular carrier bar of sheet-metal, said bar having a row of yarn guides along its front, means for revolubly mounting yarn delivery spools above the carrier bar, and means on the rear of the bar for reducing its lateral deflection and vibratory movements under load, said means consisting of a sheet-metal web element rigid with the bar, said element extending substantially throughout the length of the latter and projecting externally toward the spool level and laterally away from the spool position.

2. In a yarn carrier or tube frame, a main tubular sheet-metal carrier element of plural-spool length, a series of transverse yarn guides at the front of said element, and external laterally pro- I jecting sheet-metal flange means of substantial thickness and rigidity on the carrier element opposite to and substantially coextensive longitudinally with the series of guides, for damping lateral vibratory movements of the carrier or frame and decreasing its lateral deflection in loaded end-supported position.

3. In a yarn carrier or tube frame, a metallic carrier bar of hollow substantially rectangular section and of plural-spool length, a series of transverse yarn guides along the front portion of the bar, and a rigid web-like sheet-metal element on the bar for deflection and vibration controlling purposes, said element being longitudinally symmetrical and extending substantially the length of the guide-carrying portion of the bar, and being spaced from the yarn guides and projecting laterally from the bar at least to the extent of about half the average of the cross dimensions of the latter.

4. A plural-spool tube frame comprising a carrier' bar of sheet-metal formed to hollow tubular shape, a series of yarn guides along the front of the bar, and a longitudinal web-like element projecting externally at a corner portion of the bar opposite the yarn guides and extending throughout substantially the length of said series thereof, for reinforcing and vibration damping purposes, said element being formed integrally of the sheet-metal of the carrier bar.

5. A yarn carrier or tube frame for pile fabric looms, comprising, in combination, a hollow tubular carrier bar of sheet-metal, said bar having a row of yarn guides along its front, means for revolubly mounting yarn delivery spools above I m rid afrigid sheetmetal"element on and" projecting externally at the" back of; the bar substantially. throughout the length of" the latter andf ha its 'outer'proje'cting portion disposed pproxima'teiy concentrically With the spool axis; i f 71 If; 6. Ina yarn carrier ortubeframe, a main tu bular sheet meta'l carrier element jpf'plural-spool g'uide-carrying'portioh ofthe' bar, said element being attached to the bar at least at a plurality of points between its ends and including an inner portion projecting laterally from the carrier bar and an outer portion angularly disposed with respect to said inner portion. 7

8. In a yarn carrier for pile fabric looms, in combination, a tubular sheet-metal carrier bar of plural-spool length, a series of yarn guides along the front of the bar, and a laterally pros jecting rigid sheet-metal web element at the back of the bar externally thereof and substantially coextensive with the guide series, said element being attached to the bar at least at a plurality of points between its ends and having its outer edge portion overturned upon itself, for reinforcing and vibration-damping purposes.

9. In a yarn carrier for pile fabric looms, in combination, a tubular sheet-metal carrier bar of plural-spool length, a series of yarn guides along the front of the bar, and a laterally projecting rigid sheet-metal web element at the back of thebar externally thereof and substantially coextensive with the guide series, said element being attached to the bar at least at a plurality of points between its ends and including a flat attaching portion and a projecting portion extending angularly with respect to said attaching portion. j

10. A plural-wool yarn carrier or tube-frame for pile fabric looms comprising, in combination, two generally similar L-shaped sheet-metal sections oppositely disposed to form a hollow rectangular carrier bar, said sections each having a longitudinal flange along the edge portion of each of its walls, corresponding flanges of the two sections abutting flatwise for securing said sections in said tubular form, a series of yarn guides along one face of said bar, another face of the bar having a flange of one of said sections extend-ed to projectexternally from the bar throughout substantially the entire length of the guide series, for deflection and vibration controlling purposes.

11. A plural-spool yarn carrier or tube-frame for pile fabric looms, comprising in combination, a tubular carrier bar formed of sheet-metal ma-- terial, one longitudinal edge portion of said material being lapped and secured flatwise against another portion thereof to provide said tubular formation, a series of yarn guides along the bar spaced from said lapped securing formation ,and one of the portions included in said formation being laterally extended to project externally the bar for the plurality of spools, a rigid sheetmetal web element on the bar, said element being spaced from the guides and projecting laterally from the bar throughout substantially the length of the guide series, for deflection and vibration controlling purposes, and guard means associated with one or more of the spool bearing brackets r and projecting relatively thereto beyond the circumference of the adjacent spooled yarn supply as a stop to guard the latter against interfering contact by the web element of another carrier.

13. In a yarn carrier or tube frame, a metallic carrier bar of hollow substantially rectangular section and of plural-spool length, a series of transverse yarn guides along the front portion of the bar, and a plurality of Web-like externally projecting sheet-metal, members of a length substantially equalling that of the guide-carrying portion of the bar, said members attached to the bar at least at a plurality of points between its ends, one such member at an upper portion and another at a lower portion of the back of the bar, for deflection and vibration controlling purposes.

14. In a yarn carrier or tube frame, a metallic carrier bar of hollow substantially rectangular section and of plural-spool length, a series of transverse yarn guides along the front portion of the bar, a longitudinally symmetrical web-like sheet-metal element on the bar end extending substantially the length of the guide-carrying portion thereof, for deflection and vibration controlling purposes, said element projecting externally in the region opposite the yarn guides so as to extend outwardly and upwardly toward the level of the spool axis and adjacent the circumference of the spool position, and means for attaching said element to the bar.

WALTER BIIBY. 

